Lamp



J. WALKER.

LAMP.

APPLICATION FILED MAY 26, I919.

. 1,3 2,259. Patented June 21, 1921.

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UNITED STATES PATENT OFFICE.

JOSEPH WALKER, or CHICAGO, rumors, essre-non 'IO ANGS'IEN-KOX COMPANY, or

CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

V LAMP.

T 0 all whom it may concern Be it known that I, Josnri-r WALKER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Lamps, of which the following is a description.

My invention belongs to that general class of devices known as lamps, and relates particularly to the type of lamp employed on automobiles and other vehicles for head or tail lights. In its broadest sense, however, the invention is not limited to any particular type of lamp. The invention has among its objects the production of a device of the kind described that is simple,

convenient, durable, ornamental, efficient and and more satisfactory for use wherever found appli cable, and which may be economically manufactured. More especially it relates to an improved construction for securing the lens or glass plate, or the equivalent, to the cooperating part of the structure. Many other objects and advantages of the construction herein shown and described will be obvious to those skilled in the art from the disclosure herein given.

To this end my invention consists in the novel construction, arrangement and combination of parts herein shown and described, particularly pointed out in the claims.

In the drawings, wherein like reference characters indicate like or corresponding parts.

Figure 1 is a front elevation of the device, a portion broken away to show the construction Fig. 2 is a sectional view taken substantially on line 22 of Fig. 1;

Fig. 3 is a plan view of the inner side of a portion of the rim;

F ig.4 is a sid elevation of a portion of the device ready for assembling.

F ig'. 5 is a similar view illustrating the device partially assembled;

Fig. 6 is a similar vieiw illustrating the disassembling of the device; and

Fig. 7 is a sectional view of a portion of a slightly" modified construction.

' Referring to the drawings, it may be mentioned that 1 is a body of suitable size, shape and material, and 3 is a closure, in a lamp, the same being ordinarily a glass lens,

Specification of Letters Patent.

Application filed May 26,

Patented June 21, 1921.

1919. Serial No. 299,697.

plate or the equivalent, through which the light may pass, the part 3 being retained in place by a locking rim or part 2. The body 1, as shown, is of sheet metal of the desired number of parts, formed cup-shaped by any suitable method. However, it need not necessarily be'of sheet metal. I have not considered it necessary to illustrate in detail how in a lamp the lighting fixture is arranged within the body, or how the body is secured or supported, this varying with the intended use and is immaterial in so far as the present invention is concerned. It is also immaterial what kind of a light is used, whether electric, gas or oil. 7

The body 1 is bent, crimped, flanged or otherwise formed to provide what for convenience may be termed a single thread which extends partially about the body.

The same, however, is not strictly a thread, as the base of the'fiange at its juncture with the main portion of the body extends circumferentially in the same plane, throughout as will be seen by referring to the drawings, the edge, however, extending spirally or similar to a thread, the flange gradually decreasing. As shown, the same is substantially a half a thread decreasing in size. I hav indicated the flange or thread by the reference character 4, the edge of the same extending'spirally, the end portion 4 substantially terminating in the body. As will be noted by referring to Figs. 1 and 4, however, a shoulder 5 is formed where a portion termed the lens in the caseof a head or tail 7 light for a vehicle or for similar use, is separat from the rim and retained in place in the body by the part or rim 2. The rim 2 is bent over or crimped as at 7 to form a cooperating flange or thread arranged to engage with the spiral flange or thread 4; on the body. The same, however, is cut away at a desired point 6, the cut awayportion terminating in the shoulders 9 and 10. The extreme inner edge or inner flange of the rim 2, which is indicated by the reference character 11, is arranged to engage the lens and lock it in place on the body. The extending part 11 may extend straight, or it may be turned in slightly at the inner edge portion 15 of the rim has followed over lens and the rim.

.spring effect is obtained tainthe parts together tightly. With the 20 of 2 as indicated in Fig. 7. The purpose of this will be explained hereafter.

Assuming that the parts are disassembled as indicated in Fig. 4, with the lens 3 sprung into place in the retaining rim 2, the parts are brought together, the flange 7 at the corner 12 of the rim 2 being engaged over with the flange portion 4; on the body at some point at or adjacent the point 14. In view of the fact that there is only one flange or theread, it is not necessary to start the point 12 at 14:, as it may he slipped on so as to be partially started before turning. The rim is then turned as indicated by the arrow in Fig. 5, which may be termed clockwise, the same being turned around until tllnc tie cut out portion between points 6 and 5 and engaged the flange at 14. The rim is then turned a little more, preferably so that the cut out portion in the rim will be on the opposite side of the cut out portion in the body, as is indicated in Fig. 1.

To remove the rim, the same is turned counterclockwise as indicated by the arrow in Fig. 6. The rim portion 12 will follow the flange of the body, but the shoulder 14 when it comes opposite the notch or cut out portion at 6 will engage with the outer edge or side of the flange at point 6, which will tend to disengage the rim so that as the same is turned, the same easily becomes detachable and may be lifted off even before the same is entirely turned ofl'. V I

I have not considered it necessary to show any means for locking the rim in place other than the frictional locking between the parts, which for ordinary purposes is suflicient. It will be particularly noted that the device when einbodied in a lamp consists of substantially but three parts, the body, the Where the rim is formed with the inner flange or edge slightly turned in as at 20 in Fig. 7, a certain amount of which tends to mainpreferred construction where either one or both parts are made of sheet metal, however, there is some spring in the flange or thread. portion 4 and the rim edge. The lens is therefore always maintained tightly in position as indicated in Fig. 2, so that the same cannot rattle or become loose. The device is particularly suitable for head and tail lights on automobiles, the drawings illustrating the embodiment of the invention in a tail light. To replace a bulb, in an electric lamp, or light the gas or oil light, or to replace a lens, it is only necessary to turn the rim when the parts immediately separate. They are as easily replaced. In addition, a very attractive may be lacquered black or some other suitable color and the rim nickel plated or finished in a desired finish. The same is economical to lamp is obtained as the body manufacture as the same may all be done by suitable dies, or the equivalent, when sheet metal is employed for the purpose. WV hen securing the rim inplace, it may be mentioned that just before the rim is finally seated, it turns somewhat hard, until at the time of engagement it turns easy, and thereafter it again turns hard, gradually tightening until the parts are securely held. By the term thread .in the specification and claims, 1 wish to be understood as including a structure in which the body isformed to permit the engagement of the uniformly flanged rim therewith in the manner set forth.

Having thus described my invention it is obvious that various immaterial modifications may be made in the same without departing from the spirit'of my invention; hence I do not wishto be understood as limiting myself to the exact form, construction, arrangement and combination of parts herein shown and described, or uses mentioned.

What I claim as new and desire to secure by Letters Patent is:

combination, a sheet metal cup-shaped body,

said body having the edge out spirally and thence bent outwardly to provide substan.- tially a quarter round spiral thread decreasing in size and having its inner end terminating substantially adjacent the body, a transparent plate of a size to fit the openend of the body and arranged thereat, and means for securing said plate inplace on. the body comprising a ring shaped part constructed to overlie the edge of said plate and bent over on its outer edge. to engage and cooperate with said thread on the body, a portion of the outer edge cut away to provide. clearance of the body edge to permit seating or unseating the rim.

2. In a device of the kind described and in combination, a body having a suitably formed cylindrical end portion with the edge cut spirally and thence flanged outwardly, the base of the flan e forming a circumferential line about t e end, and a cooperating part bent over and flanged inwardly at its outer edge, one of said parts having its flange partially cut away whereby the parts may be detachably secured together upon bringing the parts together and turning one part relative to the other, or separated by turning and reversing the turning of the operating part flanged over and engaging said first mentioned flange.

4. A device of the kind described comprising a body having a flange provided with a base, and an angular edge extending spirally around the body, said edge having a coutout portion therein and progressively increasing in width, terminating at its opposite end in a shoulder of appreciable width, and a cooperating part flanged over and engaging said first mentioned flange, said cooperating part having a cutout portion along its edge providing shoulders, for the purpose described.

5. A device of the kind described comprising a cup shaped body having a flange provided with a base extending outwardly therefrom parallel with the rear portion of the body, and an angular edge projecting from said base and disposed spirally around the body, said edge being cut away for a portion of its circumference and gradually increasing in width from said cut away portion terminating in a widened portion presenting a shoulder'and a cooperating part flanged over and engaging said edge for maintaining a lense in position.

6. A device of the kind described comprising a cup shaped body having a flange provided with a base extending outwardly therefrom parallel with the rear portion of the body, and an angular edge projecting from said base and disposed spirally around the body, said edge being cut away for a portion of its circumference and gradually increasing in width from said cut away portion terminating in a widened portion presenting ashoulder, and a cooperating part flanged over and engaging said ed e for maintaining a lens in position, the anged portion of said cooperating part being provided with a cutout portion presenting shoulders and adapted to cooperate with the spiral edge of the first mentioned flange.

7. A device of the kind described comprising a body having an edge projecting therefrom and extending spirally around thebody, said edge having a cutout portion therein, the edge progressively increasing in width so as to terminate at one end in a shoulder of appreciable width, and a cooperating flanged part engaging said first mentioned spiral edge.

8. A device of the kind described comprising a body having its outer edge formed to constitute a partial thread, said thread propressively increasing in width and terminating in a shoulder of an appreciable width, said body having a cutout portion therein beginning at said shoulder and extending a portion of the way around the thread, and a cover plate adapted to extend over and engage said partial thread.

In testimony whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

J OSEPli WALKER.

Witnesses:

1101' W. HILL CHARLES I. 608B. 

